US6645423B2 - Multi-chambered container production process - Google Patents
Multi-chambered container production process Download PDFInfo
- Publication number
- US6645423B2 US6645423B2 US10/105,534 US10553402A US6645423B2 US 6645423 B2 US6645423 B2 US 6645423B2 US 10553402 A US10553402 A US 10553402A US 6645423 B2 US6645423 B2 US 6645423B2
- Authority
- US
- United States
- Prior art keywords
- pinched
- neck
- wall portion
- end wall
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C49/4812—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity and welding opposite wall parts of the parisons or preforms to each other
Definitions
- This invention relates broadly to the field of containers, such as the plastic containers that are commonly used for packaging solid and liquid detergents, cleaners and foodstuffs. More specifically, this invention pertains to an improved process for making a dual chambered container that is lightweight, strong and inexpensive to produce.
- Plastic containers are in wide use throughout the United States and the world for packaging virtually every type of liquid and solid material, for both commercial and household applications.
- the detergent industry for example, has turned increasingly to plastic containers for packaging such products as bleach, soap, sanitizing agents, and polishes.
- Plastic is relatively inexpensive, will not shatter when dropped, and is recyclable.
- packaging includes two separate containers that are joined together by a common closure having two openings.
- U.S. Pat. Nos. 5,289,950 and 5,252,312 disclose packaging of this type. These type of containers are relatively expensive to make because of the complexity of the manufacturing process, require a relatively large amount of plastic material per volume of product that is being packaged, and are undesirable to the extent that the container's design leaves open the possibility of separation of the individual containers during use.
- a basic process for producing plastic containers is through extrusion blow molding.
- the object of the process is to produce a hollow item via air inflation of a parison.
- the blow molding process involves first heating the parison, a preshaped sleeve of plastic, usually made by extrusion.
- the heated parison is engaged in a mold cavity formed by two mold halves and inflated with air delivered through a blow pin or needle.
- the parison is inflated, it takes on the shape of the mold cavity.
- the polymer quickly solidifies upon contacting the cold mold, and the finished hollow article is ejected from the mold.
- a molding process for making a plastic container that has more than one chamber and that is constructed so as to be stiffer than conventional molded multi-chambered containers.
- a parison is heated and inflated to form the container.
- first and second pinched-in areas are fashioned in the sidewall of the container.
- the first pinched-in area includes first and second wall portions that extend inwardly toward an interior of the main body of the container, and a first end wall portion connecting the first and second wall portions.
- the second pinched-in area includes third and fourth wall portions that extend inwardly toward an interior of the main body, and a second end wall portion connecting the third and fourth wall portions.
- the first end wall portion is joined to said second end wall portion so as to define separate compartments within said main body, and wherein the first end wall portion is laterally offset from the second end wall portion, whereby the flexibility of the main body about the joint of the first and second wall portions is minimized.
- the container is cooled.
- the heated parison is inflated at the same time the pinched-in areas are fashioned.
- the molding process is extrusion blow molding.
- the mold used to make the container has pinch ribs extending into a mold cavity for forming the pinched-in areas.
- FIG. 1 is a perspective view of an improved plastic container that is constructed according to a preferred embodiment of the invention
- FIG. 2 is a top elevational view of the container that is depicted in FIG. 1;
- FIG. 3 is a cross-sectional view taken along lines 3 — 3 in FIG. 1;
- FIG. 4 is a cross-sectional view taken along lines 4 — 4 in FIG. 1;
- FIG. 5 is a fragmentary view of an upper portion of the neck of the container depicted in FIGS. 1-4;
- FIGS. 6A and 6B are views of the faces of two molds showing the mold cavity and the pinch ribs according to a preferred embodiment of the invention
- FIG. 7 is a cross-sectional view taken along lines 7 — 7 in FIGS. 6A and 6B as if the mold halves are aligned;
- FIG. 8 a cross-sectional view taken along lines 8 — 8 in FIGS. 6A and 6B as if the mold halves are aligned;
- FIG. 9 is a detail view of area IX in FIG. 8 .
- an improved plastic container 10 that has more than one chamber and that is constructed so as to be stiffer than conventional multi-chambered containers includes a bottom wall 12 , a neck 14 and a main body 16 .
- the main body 16 includes a sidewall 18 that has defined therein a first pinched-in area 20 and a second pinched-in area 22 that extends inwardly toward and is joined to the first pinched-in area 20 so as to define separate compartments 42 , 44 within the main body 16 .
- the container 10 extends in three different axes; a depth axis 24 , shown in FIGS. 2 and 4, along which the depth of the container 10 can be measured; a width axis 26 also shown in FIGS. 2 and 4, along which the width of the container 10 can be measured; and a height axis 28 , shown in FIG. 1, along which the height of the plastic container 10 can be measured, and that is coincidence with the longitudinal axis of the plastic container 10 .
- the first pinched-in area 20 is characterized by a first wall portion 30 and a second wall portion 32 , both of which extend inwardly (i.e., in a direction that is principally along the depth axis 24 ), toward an interior of the main body 16 .
- a first end wall portion 34 connects the inward most extent of the first and second wall portions 30 , 32 as may best be seen in FIGS. 3 and 4.
- the second pinched-in area 22 includes a third wall portion 36 and a fourth wall portion 38 , both of which extend inwardly along the depth axis 24 into the interior of the main body 16 , and which have their inward most ends connected by a second end wall portion 40 , as can be seen in FIGS. 3 and 4.
- the first end wall portion 34 is joined to the second end wall portion 40 so as to define the first and second compartments 42 , 44 .
- first end wall portion 34 is slightly offset from the second end wall portion 40 (i.e., in the direction of the width axis 26 , as may best be seen in FIGS. 2, 3 and 4 ) so as to minimize the potential for flexure of the container 10 , or specifically the main body 16 , at the joint that is formed between the first and second end wall portions 34 , 40 .
- the two pinched-in portions could be offset to a degree that it is their sidewall portions that are joined, instead of the end walls.
- one endwall could be made larger than the other end wall.
- the container 10 is constructed so that the first and second pinched-in areas 20 , 22 extends into the neck 14 of the container 10 .
- Another important aspect of the invention involves the fact that structure is provided for reinforcing the neck 14 against collapse as a result of the pinched-in areas 20 , 22 when radial compressive pressure is applied to the neck 14 such as will occur when a closure or a spray cap is fitted onto the neck 14 .
- this structure for reinforcing the neck against collapse involves the presence of a web 46 positioned near the top of the neck 14 , which joins together and prevents flexure of at least one first pinched-in area 20 and the second pinched-in area 22 .
- the web 46 includes a first web portion 48 and a coextensive second web portion 50 , which together prevent flexure of both the first pinched-in area 20 and the second pinched-in area 22 .
- the process for producing the multi-chambered container in the preferred embodiment is the same as for other extrusion blow molding processes except for forming the pinched-in areas of the container.
- a parison is heated and engaged in a mold cavity formed by two mold halves and inflated with air delivered through a blow pin or needle. As the parison is inflated, it takes on the shape of the mold cavity. The polymer quickly solidifies upon contacting the cold mold, and the finished hollow article is ejected from the mold.
- a mold having first and second mold halves 100 and 102 with pinch ribs 104 and 106 , respectively, is used to form the pinched-in areas of the container.
- the first mold half 100 has a face 108 with an interior mold surface 110 defining a first cavity half 112 .
- the pinch rib 104 extends into the first cavity half 112 from the interior mold surface 110 .
- the pinch rib 104 has opposing first and second side surfaces 114 and 116 and an end surface 118 connecting the side surfaces. Further, the pinch rib 104 is offset from the height axis 200 .
- the first mold half 100 is made up of a body 132 with a base insert 134 below it and a neck insert 136 above it.
- a trim portion 138 is above the neck insert 136 .
- the base insert 134 contains the base portion 140 of the interior mold surface 110 and it is generally perpendicular to the face 108 .
- the body 132 contains the sidewall portion 142 of the interior mold surface 110 that extends from the base portion 140 to the neck insert 136 .
- the neck insert 136 contains the neck portion 144 of the interior mold surface 110 .
- the pinch rib 104 extends from the base portion 140 , the sidewall portion 142 and the neck portion 144 in a preferred embodiment.
- the second mold half 102 has a face 120 with an interior mold surface 122 defining a second cavity half 124 .
- the pinch rib 106 extends into the second cavity half 124 from the interior mold surface 122 .
- the pinch rib 106 has opposing first and second side surfaces 126 and 128 and an end surface 130 connecting the side surfaces. Further, the pinch rib 106 is offset from the height axis 200 .
- the second mold half 102 is made up of a body 146 with a base insert 148 below it and a neck insert 150 above it. Further, a trim portion 152 is above the neck insert 150 .
- the base insert 148 contains the base portion 154 of the interior mold surface 122 and it is generally perpendicular to the face 120 .
- the body 146 contains the sidewall portion 156 of the interior mold surface 122 that extends from the base portion 154 to the neck insert 150 .
- the neck insert 150 contains the neck portion 158 of the interior mold surface 122 .
- the pinch rib 106 extends from the base portion 154 , the sidewall portion 156 and the neck portion 158 in a preferred embodiment.
- the pinch ribs 104 and 106 approach each other but do not contact. These pinch ribs form the first and second end wall portions 34 and 40 in the container. Also, the pinch ribs are offset from the depth axis 202 such that only a portion 160 of the pinch rib 104 's end surface 118 faces only a portion 162 of the pinch rib 106 's end surface 130 . Also, when the faces are aligned, the interior cavity halves 112 and 124 correspond to form a mold cavity 164 with the pinch ribs separating two chambers 166 and 168 of the mold cavity. Other embodiments of the invention may have more than two chambers.
- Additional embodiments of the invention may have the offset pinch ribs 104 and 106 being located away from the height axis 200 and the depth axis 202 to form chambers of differing sizes. Still further embodiments of the invention may have non-vertically oriented or curved pinch ribs to form chambers of differing shapes.
- the pinch ribs 104 and 106 have top surfaces 170 and 172 , respectively, at the top of the neck inserts 136 and 150 . These top surfaces 170 and 172 extend perpendicularly from their respective neck portions 144 and 158 and define a plane 174 , when the mold faces are aligned, that is perpendicular to the height axis 200 . The top surfaces 170 and 172 form the web 46 of the container during the molding process.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Claims (25)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/105,534 US6645423B2 (en) | 1997-04-08 | 2002-03-25 | Multi-chambered container production process |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/835,263 US5928681A (en) | 1997-04-08 | 1997-04-08 | Multi-chambered container production mold |
US09/313,390 US6390324B1 (en) | 1997-04-08 | 1999-05-18 | Multi-chambered container |
US10/105,534 US6645423B2 (en) | 1997-04-08 | 2002-03-25 | Multi-chambered container production process |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/313,390 Division US6390324B1 (en) | 1997-04-08 | 1999-05-18 | Multi-chambered container |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020096808A1 US20020096808A1 (en) | 2002-07-25 |
US6645423B2 true US6645423B2 (en) | 2003-11-11 |
Family
ID=25269067
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/835,263 Expired - Fee Related US5928681A (en) | 1997-04-08 | 1997-04-08 | Multi-chambered container production mold |
US09/313,390 Expired - Fee Related US6390324B1 (en) | 1997-04-08 | 1999-05-18 | Multi-chambered container |
US10/105,534 Expired - Fee Related US6645423B2 (en) | 1997-04-08 | 2002-03-25 | Multi-chambered container production process |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/835,263 Expired - Fee Related US5928681A (en) | 1997-04-08 | 1997-04-08 | Multi-chambered container production mold |
US09/313,390 Expired - Fee Related US6390324B1 (en) | 1997-04-08 | 1999-05-18 | Multi-chambered container |
Country Status (1)
Country | Link |
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US (3) | US5928681A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9823261B2 (en) | 2013-11-05 | 2017-11-21 | Siemens Healthcare Diagnostics Inc. | Multi-well wedge-shaped reagent container with auto-open capability |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5928681A (en) | 1997-04-08 | 1999-07-27 | Crown Cork & Seal Technologies Corporation | Multi-chambered container production mold |
EP0979782B1 (en) * | 1998-08-10 | 2001-07-11 | Alpla Werke Alwin Lehner GmbH & CO. KG | Multi-compartment blow-molded plastic bottle and closure therefor |
AU2001264725A1 (en) * | 2000-05-22 | 2001-12-03 | The Procter And Gamble Company | A kit for caring for a fabric article |
US20030006247A1 (en) * | 2001-07-09 | 2003-01-09 | Jason Olivier | Ingredient delivery system |
US6669048B2 (en) * | 2002-03-12 | 2003-12-30 | Basf Corporation | Neck apparatus and closure system for a multi-compartment bottle |
US7036684B1 (en) * | 2002-06-13 | 2006-05-02 | Hantman Ken S | Diagonally divided bottle with curved line of division distinct from edge curve |
US20040206717A1 (en) * | 2003-04-15 | 2004-10-21 | Flies Matthew B. | Compartmentalized beverage container |
WO2005049447A1 (en) * | 2003-11-12 | 2005-06-02 | E.I. Dupont De Nemours And Company | Dual compartment flexible pouch and a fitment with dual-dispensing capabilities therefor |
DE10360365A1 (en) * | 2003-12-22 | 2005-07-21 | Agfaphoto Gmbh | Containers for photographic processing chemicals |
US20050173440A1 (en) * | 2004-02-06 | 2005-08-11 | Kevin Johnson | Multiple-vessel container |
US7975868B1 (en) | 2004-04-15 | 2011-07-12 | Flies Matthew B | Compartmentalized beverage container |
CN1968864B (en) * | 2004-06-22 | 2010-06-23 | 宝洁公司 | Ergonomic closure |
CN100450748C (en) * | 2005-06-29 | 2009-01-14 | 秦川 | Multi-mouth bottle and bottles produced thereby |
US20070187429A1 (en) * | 2006-02-15 | 2007-08-16 | Bardia Farahmand | Dual opening tubular dispenser |
US20100314388A1 (en) * | 2009-06-12 | 2010-12-16 | Grady Gibson | Dual combination wine bottle |
US20110101034A1 (en) * | 2009-11-03 | 2011-05-05 | Baeten Mary C | Fluid dispenser containing a baffle |
US9075039B2 (en) | 2011-11-08 | 2015-07-07 | Becton, Dickinson And Company | Container and cap for a biological specimen |
US8870027B2 (en) | 2012-03-15 | 2014-10-28 | David G. Kraenzle | Multi-bottle containers for dispensing measured quantities of liquids |
EP3526389A1 (en) * | 2016-10-11 | 2019-08-21 | Unilever PLC | Laundry dosing device |
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Fig. 1 through 6 depicting a prior art container (Figs. 4-6 depict a top view of the container after removal of the trigger sprayer shown in Fig. 1). |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US9823261B2 (en) | 2013-11-05 | 2017-11-21 | Siemens Healthcare Diagnostics Inc. | Multi-well wedge-shaped reagent container with auto-open capability |
Also Published As
Publication number | Publication date |
---|---|
US20020096808A1 (en) | 2002-07-25 |
US5928681A (en) | 1999-07-27 |
US6390324B1 (en) | 2002-05-21 |
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